Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1990-06-04
1992-01-07
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524601, 525437, 528176, 528179, C08J 6700, C08L 6700, C08G 6300
Patent
active
050792890
ABSTRACT:
This invention pertains to novel copolyesters consisting essentially of units (I), (II), (III), and (V). ##STR1## and blends of these polymers and articles made from both. Units (I), (II), (III), and (IV) are present in specified proportions as defined in the "Description of the Invention". The instant copolyesters display orientation in the molten state, good fiber ratings and high strength; they have melting points in the range of from about 340.degree. to about 400.degree. C. and are melt-processible. Advantageously, these compositions filled with about 30 weight percent of glass fibers display heat distortion temperatures of over 240.degree. C. up to about 280.degree. C. and higher, when measured under a load of 264 psi. When blended, certain properties are improved, particularly they are easier to melt fabricate, have a decreased tendency to blister and increased strength. These polymers and blends may be used advantageously in ovenware, electronic components, electrical equipment, and other end uses requiring high temperatures.
REFERENCES:
patent: 4585823 (1986-04-01), Saito et al.
patent: 4626557 (1986-12-01), Duska et al.
patent: 4742149 (1988-05-01), Finestone
Cleary James W.
Frayer Paul D.
Huspeni Paul J.
Layton Richard
Matzner Markus
Amoco Corporation
Anderson Harold D.
Hooper Matthew R.
Magidson William H.
Medhurst Ralph C.
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